4cade/src/prelaunch/mazeblox.a
2022-05-14 12:23:14 -07:00

65 lines
1.3 KiB
Plaintext

;license:MIT
;(c) 2021-2022 by Frank M., qkumba
!cpu 6502
!to "build/PRELAUNCH.INDEXED/MAZEBLOX",plain
*=$106
!source "src/prelaunch/common.a"
+ENABLE_ACCEL
lda #<hook1
sta $A10+1
lda #>hook1
sta $A10+2
jmp $800 ; decompress1
hook1 lda #<hook2
sta $B747+1
lda #>hook2
sta $B747+2
jmp $B700 ; decompress2
hook2 lda #<hook3
sta $9E4D+1
lda #>hook3
sta $9E4D+2
ldx #0
stx $9E52
inx
stx $9E53 ; reset vector fix
jmp $9D84 ; decompress3
hook3 +READ_RAM2_NO_WRITE
lda MachineStatus
and #CHEATS_ENABLED
beq +
lda #<hook4
sta $BD07
lda #>hook4
sta $BD08
+
jsr DisableAccelerator
+READ_ROM_NO_WRITE
jmp $A180
hook4
pla
pla
jsr $BD5F
jsr $BD09
lda $B7EC
cmp #$13
bne +
lda $B7ED
cmp #5
bne +
lda #$AD
sta $1920 ; patch - don't decrease time
+ clc
rts
!if * > $1C0 {
!error "code is too large, ends at ", *
}